Here's the problem. Have an external hard drive. Worked fine with my Lombard (OS 9) and my Pismo (OSx.x.x). In fact, the Pismo sucked all of my mp3s off the external drive and into iTunes without my asking. So, I know they're compatible. Now that I have an iMac 17-inch and an iBook and have upgraded my Pismo's OS, nothing recognizes the external drive. How do I get the new OS to see the files on the external drive?